KEY POINTS
  • The cyberattack, which hit the ministry of foreign affairs, the cabinet of ministers and the security and defense council among others, comes as Kyiv and its allies have sounded the alarm about a possible new military offensive on Ukraine.
  • Russia has previously denied being behind cyber attacks on Ukraine.
"Russia may try to do something particularly nasty, something particularly cruel" this week, said Ukrainian President Volodymyr Zelenskyy.

A massive cyberattack warning Ukrainians to "be afraid and expect the worst" hit government websites on Thursday night, leaving some websites inaccessible on Friday morning and prompting Ukraine to open an investigation.

Ukraine's foreign ministry spokesperson told Reuters it was too early to say who could be behind the attack but said Russia had been behind similar strikes in the past.